X0306 4 2021-05-12 0 0001644406 Hostess Brands, Inc. TWNK 0001553018 Callahan Andrew P C/O HOSTESS BRANDS, INC. 7905 QUIVIRA ROAD LENEXA KS 66215 1 1 0 0 See Remarks Class A Common Stock, par value $0.0001 per share 2021-05-12 4 F 0 9801 15.70 D 107078 D Restricted Stock Units 174117 D On May 12, 2021, Hostess Brands, Inc. withheld 9,801 shares of Class A common stock to satisfy withholding taxes due in connection with the vesting of one-third of the shares of Class A common stock underlying an award of restricted stock units previously granted to the reporting person. Such shares had a market value of $15.70 per share, the closing price of the Class A common stock on May 7, 2021, the vesting date. Consists of previously disclosed restricted stock units that remain subject to time-based vesting criteria. President and Chief Executive Officer /s/ Jolyn J. Sebree, Attorney-in-Fact 2021-05-14